New York City Mayor Bill de Blasio Has Proposed the Barclays Center to be the site of the Convention

New York City Mayor Bill de Blasio has proposed Brooklyn's Barclays Center to be the site of the 2016 Democratic National Convention, marking what would be a first for the borough that has long stood in Manhattan's shadow but has recently grown in stature.

Mr. de Blasio, a Democrat who raised his family in Park Slope, Brooklyn, promised last year when he successfully campaigned for City Hall that he would devote resources to the...